massgen/MassGen: Terminal Multi-Agent Consensus System Inspired by Grok Heavy and Gemini Deep Think — All Agents Solve Full Problem, Then Vote — 613 Stars

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MassGen is an open-source terminal tool that orchestrates multiple frontier models where every agent independently solves the complete problem, then agents observe and critique each other's outputs across refinement cycles before voting on the strongest collectively-validated answer. The architecture generalizes the ensemble reasoning patterns used in Grok Heavy and Gemini Deep Think as an open-source primitive any developer can run locally against any combination of frontier models. At 613 stars with an active Discord, it offers a concrete alternative to single-model inference for high-stakes tasks where answer quality justifies multi-model coordination cost.